Describe the scientific methods used to determine the age of the universe

Nh3 +02-no + h20 is unbalanced what is the balanced equation

Red blood cells are responsible for transporting oxygen in the blood. people with sickle cell anemia were born with a defective gene that results in sickle-shaped red blood cells. individuals with the disease often suffer pain in their extremities due to the build-up of these cells causing blockages in the blood vessels. the shape of the blood cells also reduces the amount of oxygen transported in the blood.

If t=tall and t=short what is the likelihood that the offspring will be tall? a.0% b.25% c.50% d.75%